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Tap water quality report

Cornerstone Estates 606

EPA monitoring tested this supplier for 54 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

54
contaminants tested
3
detected
48
people served
1
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Thurston

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

1
health-based violations
515
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2006-10-01 → 2006-10-31
Other Monitoring Resolved 2010-07-01
MR Monitoring Resolved 2010-06-01 → 2010-06-30
MR Monitoring Resolved 2010-04-01 → 2010-04-30
MR Monitoring Resolved 2010-03-01 → 2010-03-31
MR Monitoring Resolved 2010-02-01 → 2010-02-28
MR Monitoring Resolved 2010-01-01 → 2010-01-31
MR Monitoring Archived 2006-09-01 → 2006-09-30
MR Monitoring Unaddressed 2006-01-01
MR Monitoring Resolved 2005-10-01 → 2005-12-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2400 µg/L 24%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Lead
0.0015 mg/L 10%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2025
Nitrate-Nitrite
2340 µg/L 23%
of the EPA limit 10000 µg/L
 1/1 SYR4 2019
51 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicBariumBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDalaponDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEthylbenzeneFluorideLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Kimberly Gubbe

Frequently asked questions about Cornerstone Estates 606

Is Cornerstone Estates 606 tap water safe to drink?

EPA monitoring detected 3 contaminants in Cornerstone Estates 606's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Cornerstone Estates 606's water?

EPA monitoring detected Nitrate, Lead, Nitrate-Nitrite. The full list with the level and data source for each is above.

How many people does Cornerstone Estates 606 serve?

Cornerstone Estates 606 reports serving 48 people in Washington, per its EPA record.

Has Cornerstone Estates 606 had any water quality violations?

The EPA has 515 violations on file for Cornerstone Estates 606, of which 1 is health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.